Question

please tell me
I want to solve this numerical...so, please tell me quickly​

Answer 1

Answer:

Let at the point P the net gravitational force be zero.

Let,M=mass of the Earth

m=mass of the moon

m

′

=mass of the object

M=81cm (given)

(R−r)

2

Gmm '=

r 2Gmm ′

=>

(R−r) 281

=

r 21

=>

{(3.8×10 5 )−r} 2

81= r 21

Solving,we get ,r=3.8×10 7m

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